Add 70/28 and 80/15
1st number: 2 14/28, 2nd number: 5 5/15
70/28 + 80/15 is 47/6.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 28 and 15 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 28 × 15 = 420,
70/28 = 70 × 15/28 × 15 = 1050/420 - Likewise, for the 2nd fraction, since 15 × 28 = 420,
80/15 = 80 × 28/15 × 28 = 2240/420 - Add the two like fractions:
1050/420 + 2240/420 = 1050 + 2240/420 = 3290/420 - 3290/420 simplified gives 47/6
- So, 70/28 + 80/15 = 47/6
In mixed form: 75/6
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 70/56+80/15 70/28+80/30 70/84+80/15 70/28+80/45 70/28+80/75